https://llvm.org/bugs/show_bug.cgi?id=31722
Bug ID: 31722
Summary: [Regression 3.9.1] Wrong colors in icons when using
radeonsi + LLVM 3.9.1
Product: libraries
Version: 3.9
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: Backend: AMDGPU
Assignee: unassignedb...@nondot.org
Reporter: nhaeh...@gmail.com
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
See the reports at:
https://bugs.freedesktop.org/show_bug.cgi?id=99078
https://bugs.launchpad.net/ubuntu/+source/llvm-toolchain-3.9/+bug/1656620?comments=all
This has been tracked down to r288105, the backport of "AMDGPU: Fix an
interaction between WQM and polygon stippling".
Looking at shader dumps from the bug reports, there are shaders affected by the
bug that was fixed by "AMDGPU: Do not clobber SCC in SIWholeQuadMode" in trunk.
I think it's reasonably low-risk to back-port
AMDGPU: Reduce the duration of whole-quad-mode
AMDGPU: Do not clobber SCC in SIWholeQuadMode
since they've been in trunk and hence the Padoka PPA for Ubuntu for several
months and I'm not aware of any bugs reported since then. Alternatively, we
could revert
AMDGPU: Fix an interaction between WQM and polygon stippling
to go back to how things were in 3.9 -- this re-introduces a low-impact bug,
but would fix this high-impact bug.
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